In her new book about her time on the presidential campaign trail covering then-candidate Donald Trump, MSNBC host Katy Tur described receiving an unwelcome greeting from the president: a kiss on the cheek.

The incident happened before one of Trump's appearances on MSNBC's "Morning Joe."

"Before I know what's happening, his hands are on my shoulders and his lips are on my cheek," Tur wrote of the encounter. "My eyes widen. My body freezes. My heart stops."

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AUSTIN, TX - MARCH 16: News correspondent of NBC Katy Tur speaks onstage at 'The War at Home: Trump and the Mainstream Media' during 2017 SXSW Conference and Festivals at JW Marriott on March 16, 2017 in Austin, Texas. (Photo by Mindy Best/Getty Images for SXSW)

Trump has publicly berated Tur for her critical coverage of him — calling her out by name from the podium at two campaign rallies, in one instance describing her as "Little Katy" — and has accused her of being a "third-rate reporter" and having "no access" to him or his campaign.

On Tuesday morning, following the release of Tur's book, Trump tweeted, "Fascinating to watch people writing books and major articles about me and yet they know nothing about me & have zero access. #FAKE NEWS!"